I don't believe that the cable company would be thrilled to know that their signal is split into several different TV units throughout the house.
I'm pretty sure that the cable box is for ONE TV and if you want to watch cable (different channel) on another TV they will offer you a second TV discount and a second box.
If you want the hook up several TVs in series and watch the same channel on all of them (just in different rooms) then that ought to be fairly easy with a spliter (and perhaps a signal apmplifier), but I wouldn't advertise that to the cable co.
Splitting the signal into separate channels would be considered theft of service subject to a 3am visit by the Feral Broadcast Inquisitor Gestapo resulting in your mysterious dissapearance.
